Two good examples in support of your question are measles and chicken pox which do appear to be highly contagious. Are most illnesses like Covid barely contagious? Are "viruses" real, but too many things are called viruses which are really something else?
Two good examples in support of your question are measles and chicken pox which do appear to be highly contagious. Are most illnesses like Covid barely contagious? Are "viruses" real, but too many things are called viruses which are really something else?